The message that I get upon bootup says…
[35.615862] Support for cores revisions 0x17 and 0x18 disabled by module param allhwsupport=0. Try b43.allhwsupport=1
More information would be helpful. I’m assuming you manually installed the legacy b43 driver and firmware?
Module parameters can be added like this arch linux - b43 wireless driver error - Unix & Linux Stack Exchange in /etc/modprobe.d or at boot using the kernel boot commandline (see man clr-boot-manager)